package com.heima.wemedia.service.impl;

import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.wemedia.dtos.WmLoginDto;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.utils.common.AppJwtUtil;
import com.heima.wemedia.mapper.WmUserMapper;
import com.heima.wemedia.service.WmUserService;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.util.HashMap;
import java.util.Map;

@Service
public class WmUserServiceImpl extends ServiceImpl<WmUserMapper, WmUser> implements WmUserService {

    @Override
    public ResponseResult login(WmLoginDto dto) {
        //TODO
        //1.校验参数
        if (StringUtils.isBlank(dto.getName()) || StringUtils.isBlank(dto.getPassword())) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_REQUIRE);
        }

        //2.查询用户
        //Wrappers.<WmUser>lambdaQuery().eq(WmUser::getName, dto.getName())
        WmUser wmUser = getOne(Wrappers.<WmUser>lambdaQuery().eq(WmUser::getName, dto.getName()));
        //判断用户是否存在
        if (wmUser == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST, "用户不存在");
        }
        //3.校验密码
        String password = wmUser.getPassword();
        String salt = wmUser.getSalt();
        if (!password.equals(DigestUtils.md5DigestAsHex((dto.getPassword() + salt).getBytes()))) {
            //密码错误
            return ResponseResult.errorResult(AppHttpCodeEnum.LOGIN_PASSWORD_ERROR);
        }
        //4.生成token
        String token = AppJwtUtil.getToken(wmUser.getId().longValue());
        wmUser.setPassword("");
        wmUser.setSalt("");
        //5.封装返回数据，返回token和用户信息
        Map<String, Object> map = new HashMap();
        map.put("user", wmUser);
        map.put("token", token);

        return ResponseResult.okResult(map);
    }
}